1st: DVM name2nd: Source column name defined in the DVM.3rd: XPath of source data to be transferred, which will not be wrapped as string. In another word, there is no double quote marks at the begining and end of it. If it uses double quote marks, it means this param is a constant.4th: Target column name5th: Default value. If it is from a BPEL variable, please don't quote it with double quote marks.

It is simple, but you have to pay attention to the 3rd and 5th parameters if the value of them are dynamic.